CN115403211B - Seawater bacteriostasis system and process of electromagnetic composite polarized bactericide - Google Patents
Seawater bacteriostasis system and process of electromagnetic composite polarized bactericide Download PDFInfo
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- CN115403211B CN115403211B CN202211242425.4A CN202211242425A CN115403211B CN 115403211 B CN115403211 B CN 115403211B CN 202211242425 A CN202211242425 A CN 202211242425A CN 115403211 B CN115403211 B CN 115403211B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
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- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention discloses a seawater bacteriostasis system and a bacteriostasis process of an electromagnetic composite polarization bactericide, comprising a mixer and a polarization device, wherein the inlet end of the mixer is respectively connected with a seawater circulating water source and a bactericide source, the outlet end of the mixer is connected with the water inlet of the polarization device, and the water outlet of the polarization device is connected with an external pipeline; the polarization device comprises a variable frequency controller, a shell, a cathode and an anode, wherein the cathode and the anode are both connected with the variable frequency controller, the cathode and the anode are graphite electrodes, a water inlet and a water outlet are arranged on the shell, and the cathode and the anode are externally arranged on the shell or are internally lined on the shell. Adding a bactericide into seawater circulating water, uniformly mixing the bactericide and the seawater circulating water, conveying the mixed solution into a polarization device, applying variable frequency pulse to the seawater circulating water, and performing intensified sterilization on the seawater circulating water, wherein the time of the variable frequency pulse is not less than 10s; the voltage variation range of the variable frequency pulse is 150-220V, and the variable frequency range is 30-90Hz.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a seawater bacteriostasis system and a bacteriostasis process of an electromagnetic composite polarization bactericide.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
I have a large number of thermal power plants built at seaside, belonging to the seaside power plant. The seawater is used as cooling water or desulfurization water source in the beach power plant, and the concentration ratio of the seawater is obviously lower than that of circulating water systems using medium water, surface water and the like as water sources due to the fact that the seawater is larger in collecting quantity, so that the water quality indexes of the seawater before and after the seawater is used as circulating water are smaller in change amplitude than those of the medium water, the surface water and the like. However, the seawater has a large number of microorganisms, and under the conditions that the temperature of the seawater circulating water is increased and the water quality is not obviously changed, fungus is rapidly propagated, so that the circulating water system is easily corroded and blocked.
The addition of the antibacterial bactericide is a key factor for ensuring the stable operation of the circulating water system, but when the amount of the antibacterial bactericide is low, the antibacterial effect is poor, and the inhibition effect of the bacteria of the circulating water system is not enough. When the addition amount is too large, the excessive bactericide can be discharged into a seawater basin along with the drainage, and the ecological balance of the area is destroyed.
Disclosure of Invention
Aiming at the problem that the balance of bacteriostasis and environmental protection is difficult to realize in the current circulating water bactericide adding technology of the beach power plant, the invention provides a seawater bacteriostasis system and a bacteriostasis process of an electromagnetic composite polarization bactericide.
In order to achieve the above object, the present invention is realized by the following technical scheme:
in a first aspect, the invention provides a seawater bacteriostatic system of an electromagnetic composite polarized bactericide, which comprises a mixer and a polarizing device, wherein,
the inlet end of the mixer is connected with a seawater circulating water source and a bactericide source respectively, the outlet end of the mixer is connected with the water inlet of the polarization device, and the water outlet of the polarization device is connected with an external discharge pipeline;
the polarization device comprises a variable frequency controller, a shell, a cathode and an anode, wherein the cathode and the anode are both connected with the variable frequency controller, the cathode and the anode are graphite electrodes, a water inlet and a water outlet are arranged on the shell, and the cathode and the anode are externally arranged on the shell or are internally lined on the shell.
In a second aspect, the invention provides a seawater bacteriostasis process of an electromagnetic composite polarization bactericide, which comprises the following steps:
adding a bactericide into seawater circulating water, uniformly mixing the bactericide and the seawater circulating water, conveying the mixed solution into a polarization device, applying variable frequency pulse to the seawater circulating water, and performing intensified sterilization on the seawater circulating water, wherein the time of the variable frequency pulse is not less than 10s;
the voltage variation range of the variable frequency pulse is 150-220V, and the variable frequency range is 30-90Hz.
The beneficial effects achieved by one or more embodiments of the present invention described above are as follows:
(1) The dosing-electromagnetic composite polarization coupling method is used for a seawater cooling system bacteriostasis process, changes little to a seawater cooling water system, and an electromagnetic field generating system can directly adopt station power without additional electric transformation.
(2) The variable-frequency electromagnetic field forms a regular electromagnetic field through the periodical change of voltage and frequency, changes the microstructure of the bactericide (comprising the aggravated degree of molecular polarization, increased solubility and the like), improves the molecular polarity of the oxidized bactericide and the non-oxidized bactericide, can increase the sterilization effect and the reaction efficiency of the medicament, can greatly reduce the dosage and reduce the medicament cost; the sterilizing effect of the sterilizing agent can be greatly increased, the oxidation effect of the sterilizing agent can be increased, the indexes such as BOD5 and COD can be reduced, the condenser is protected, the scaling of the condenser is avoided, the seawater cooling system can be efficiently maintained, the failure occurrence rate is reduced, and the overhaul cost is reduced.
And the bactericide residue is not detected in the treated circulating water, so that the bactericidal capability is greatly improved after the bactericide is activated, the bactericidal process can be effectively participated, and the bacterial residue is reduced, so that ecological problems in the surrounding sea area caused by long-term discharge of the residual bactericide are avoided, and the requirements of the circulating water treatment of the seaside power plant can be met.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
Fig. 1 is a diagram of a drug-electromagnetic composite polarization coupling system in an embodiment of the present invention.
In the figure: 1. seawater circulating water source, 2 a dosing tank (oxidized/non-oxidized bactericide), 3 a static mixer, 4 an electromagnetic generator, 5 a polarization device and 6 a circulating water.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
In a first aspect, the invention provides a seawater bacteriostatic system of an electromagnetic composite polarized bactericide, which comprises a mixer and a polarizing device, wherein,
the inlet end of the mixer is connected with a seawater circulating water source and a bactericide source respectively, the outlet end of the mixer is connected with the water inlet of the polarization device, and the water outlet of the polarization device is connected with an external discharge pipeline;
the polarization device comprises a variable frequency controller, a shell, a cathode and an anode, wherein the cathode and the anode are both connected with the variable frequency controller, the cathode and the anode are graphite electrodes, a water inlet and a water outlet are arranged on the shell, and the cathode and the anode are externally arranged on the shell or are internally lined on the shell.
Polarization is a phenomenon in which the potential deviates from the electrode open-circuit potential due to movement of current. When an electric field is added to two ends of the water body, the microscopic morphology of polar substances in the water can change to a certain extent, including the phenomena of aggravated molecular polarization degree, increased solubility and the like. The common bactericides in the circulating water system comprise sodium hypochlorite, isothiazolinone and the like, all belong to polar substances, when an electric field is externally applied, the property of the bactericide can be changed to a certain extent, and the molecular structure of the bactericide can be changed to a certain extent, so that the sterilizing effect is doubled, the utilization rate of the bactericide is increased, and therefore, in the final circulating water drainage, the residual rate of the bactericide is greatly reduced, the good sterilizing and bacteriostasis effects are obtained, the running stability of the circulating water system is maintained, the content of the bactericide in the circulating water drainage is reduced to the minimum, the change of the water quality of the sea area due to the excessive addition of the bactericide is avoided, the ecological balance is maintained, and the environment is protected.
In some embodiments, the mixer is a static mixer.
In some embodiments, the distance between the mixer and the polarizing device is not less than 10m to enable sufficient dispersion of the sterilant.
Preferably, the length of the cathode and the anode is 1m or more. To ensure that enough variable frequency pulse time is applied to the seawater circulating water.
In some embodiments, the variable frequency control has a voltage variation range of 150-220V and a variable frequency range of 30-90Hz.
In some embodiments, the cathode and anode are disposed externally to the housing, the cathode and anode being wrapped around an outer surface of the housing.
The housing may be a container housing provided separately or may be a water inlet conduit directly.
In some embodiments, the mixer is connected to a pressurized metering pump, which is connected to a sterilant dosing tank.
In a second aspect, the invention provides a seawater bacteriostasis process of an electromagnetic composite polarization bactericide, which comprises the following steps:
adding a bactericide into seawater circulating water, uniformly mixing the bactericide and the seawater circulating water, conveying the mixed solution into a polarization device, applying variable frequency pulse to the seawater circulating water, and performing intensified sterilization on the seawater circulating water, wherein the time of the variable frequency pulse is not less than 10s;
the voltage variation range of the variable frequency pulse is 150-220V, and the variable frequency range is 30-90Hz.
In some embodiments, the temperature of the seawater circulating water is 90 ℃ or less;
when the temperature of the seawater circulating water is 30-40 ℃, the voltage change range is 150-180V, and the frequency change range is 40-50Hz;
when the temperature of the circulating water is 40-50 ℃, the voltage change range is 170-200V, and the frequency change range is 50-80Hz;
when the temperature of the circulating water is 50-60 ℃, the voltage change range is 190-220V, and the frequency change range is 70-90Hz.
Different electromagnetic fields are established aiming at circulating water with different temperatures, so that the use amount of the oxidized bactericide and the non-oxidized bactericide is reduced, and the reaction efficiency and the sterilization effect of the oxidized bactericide and the non-oxidized bactericide are improved in a targeted manner. Not only obtains good total sterilization rate, but also can reduce the indexes of COD, BOD5 and the like of the seawater circulating water. The process has excellent circulating water sterilization efficiency, ecological benefit and economic benefit, so that the process has great application prospect.
In some embodiments, the germicides are oxidizing germicides and non-oxidizing germicides.
The seawater circulating water system reconstruction process is used for improving the sterilizing capacity of the oxidized sterilizing agent and the non-oxidized sterilizing agent, realizing reasonable addition of the medicament and avoiding the waste of the medicament and the influence of excessive medicament on the ecological environment. By modifying the seawater circulating water system, on one hand, the chemical adding point is improved, and chemical adding is started from the water inlet, so that the contact time of the bactericide and pollutants in water is prolonged, the residual quantity of the final bactericide in the water is reduced, and the ecological influence on the sea area of the circulating water is reduced. And secondly, the process adopts a variable frequency variable pressure type polarization mode to treat the circulating water, wherein the variable frequency variable pressure type polarization mode accurately controls the temperature of the circulating water, activates the molecular state of the bactericide into an active state, can play the sterilization function of the bactericide, has excellent activation functions on both the oxidized bactericide and the non-oxidized bactericide, and reduces the dosage of the bactericide along with enhancing the sterilization effect of the medicament in the circulating water. The higher the active state of the molecule, the higher the ability to participate in the reaction, due to the different active states of the molecule at different temperatures. The process disclosed by the invention is capable of efficiently controlling the electromagnetic field by the real-time water temperature of the circulating water, so that the reaction capacity of the bactericide can be fully activated, the sterilizing effect is improved, the residual rate of the final bactericide is reduced, and compared with the traditional polarization mode, the process is more focused on activating the molecular state of the bactericide, improving the sterilizing effect of the bactericide, reducing the residual quantity of the bactericide, and not on removing calcium and magnesium ions and inhibiting scaling. Because the concentration ratio is lower when the seawater is used as cooling water, the scaling problem of calcium and magnesium ions can be considered as a secondary problem, and in conclusion, the treatment process of the seawater as the circulating water can not only meet the treatment requirement of the seawater as the circulating water, but also can not influence the ecological environment any more as the bactericide discharged from the seawater cooling water is reduced to an extremely low level, and can meet the treatment requirement of the seawater as the cooling water.
The present invention will be described in detail with reference to the following examples, and the effects of the present invention are shown below.
Example 1
1. A dosing point is arranged near an opening of the water inlet pipe and is connected with a booster-type metering pump, the metering pump is connected with a bactericide dispensing box, the starting of the metering pump is controlled by a signal transmitted by a water inlet pump, and the bactericide is added according to the water inlet amount. A static mixer is arranged at the dosing point and is used for fully mixing the bactericide and the seawater circulating water. A polarization device is additionally arranged behind the dosing point, the distance between the dosing point and the polarization device is 12m, the length of an electrode is 1m, and the average time of variable frequency pulses flowing through a water body in a polarized pipeline is 15s;
2. the cooling water system of the Huaneng smoke station power plant is taken as an implementation object, sterilizing agents are added according to the inflow of seawater, a variable-frequency electromagnetic field device is opened, electromagnetic field treatment is carried out on circulating water, and reinforced sterilization treatment is carried out on the seawater. The temperature of the circulating water is 38 ℃, the voltage variation range is 150-180V, and the frequency variation range is 30-60Hz;
3. the water quality analysis process comprises indexes such as total colony amount, BOD5, COD and the like of the seawater circulating water, and the water quality analysis data are shown in table 1.
TABLE 1
Example 2
1. A dosing point is arranged near an opening of the water inlet pipe and is connected with a booster-type metering pump, the metering pump is connected with a bactericide dispensing box, the starting of the metering pump is controlled by a signal transmitted by a water inlet pump, and the bactericide is added according to the water inlet amount. A static mixer is arranged at the dosing point and is used for fully mixing the bactericide and the seawater circulating water. A polarization device is additionally arranged behind the dosing point, the distance between the dosing point and the polarization device is 11m, the length of an electrode is 1.3m, and the average time of variable frequency pulses flowing through a water body in a polarized pipeline is 17s;
2. taking a cooling water system of a Hua-electric Longkou power plant as an implementation object, wherein the temperature of circulating water is 44 ℃, the voltage variation range is 170-200V, and the frequency variation range is 50-80Hz;
3. the water quality analysis process comprises indexes such as total colony amount, BOD5, COD and the like of the seawater circulating water, and the water quality analysis data are shown in table 2.
TABLE 2
| Project | Dosage of medicine | Sterilization rate | BOD5 removal rate | COD removal rate |
| Sodium hypochlorite | 1.5ppm | 58％ | 5％ | 4％ |
| Isothiazolinones | 1.5ppm | 54％ | -- | -- |
| Electromagnetic and sodium hypochlorite | 0.5ppm | 88％ | 10％ | 9％ |
| Electromagnetic + heteroThiazolinones | 0.5ppm | 91％ | -- | -- |
Example 3
1. A dosing point is arranged near an opening of the water inlet pipe and is connected with a booster-type metering pump, the metering pump is connected with a bactericide dispensing box, the starting of the metering pump is controlled by a signal transmitted by a water inlet pump, and the bactericide is added according to the water inlet amount. A static mixer is arranged at the dosing point and is used for fully mixing the bactericide and the seawater circulating water. A polarization device is additionally arranged behind the dosing point, the distance between the dosing point and the polarization device is 12m, the length of an electrode is 1m, and the average time of variable frequency pulses flowing through a water body in a polarized pipeline is 15s;
2. taking a cooling water system of a national energy source Suaeda power plant as an implementation object, wherein the temperature of circulating water is 52 ℃, the voltage variation range is 190-220V, and the frequency variation range is 70-90Hz;
3. the water quality analysis process comprises indexes such as total colony amount, BOD5, COD and the like of the seawater circulating water, and the water quality analysis data are shown in table 3.
TABLE 3 Table 3
| Project | Dosage of medicine | Sterilization rate | BOD5 removal rate | COD removal rate |
| Sodium hypochlorite | 1.5ppm | 55％ | 7％ | 6％ |
| Isothiazolinones | 1.5ppm | 55％ | -- | -- |
| Electromagnetic and sodium hypochlorite | 0.5ppm | 83％ | 11％ | 11％ |
| Electromagnetic +isothiazolinones | 0.5ppm | 80％ | -- | -- |
Example 4
The seawater circulating water treated in examples 1 to 3 was subjected to sodium hypochlorite and isothiazolinone content detection, and the hydrogen peroxide content detection conditions are shown in Table 4.
TABLE 4 Table 4
The invention realizes the rapid reduction of the total fungus amount in the circulating water of a plurality of seashore power plants and the rapid reduction of BOD5 and COD indexes by constructing the rapid treatment process of the seawater circulating water based on the variable frequency electromagnetic field excitation device, is applicable to common oxidized and non-oxidized bactericides, and has no residual bactericides in the treated seawater circulating water. On one hand, the sterilization effect of the bactericide is rapidly improved, the residual rate of total bacteria in the seawater is deeply reduced, the problems of scaling, bacteria growth and the like of a seawater cooling system are avoided, and on the other hand, according to the analysis test of the residual amount of the bactericide, various bactericides are completely reacted in the seawater treatment process. Therefore, the process provides a novel efficient rapid seawater circulating water treatment mode, which can rapidly and deeply reduce the total fungus content in the seawater circulating water, reduce the pollution index of a plurality of circulating water, greatly improve the treatment efficiency, and ensure that the seawater drainage basins around the power plant are not influenced by residual bactericides. Therefore, the process has wide application prospect and is expected to be used for more water treatment systems.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A sea water antibacterial system of electromagnetic composite polarization bactericide is characterized in that: comprising a mixer and a polarizing device, wherein,
the inlet end of the mixer is connected with a seawater circulating water source and a bactericide source respectively, the outlet end of the mixer is connected with the water inlet of the polarization device, and the water outlet of the polarization device is connected with an external discharge pipeline;
the polarization device comprises a variable frequency controller, a shell, a cathode and an anode, wherein the cathode and the anode are both connected with the variable frequency controller, the cathode and the anode are graphite electrodes, a water inlet and a water outlet are arranged on the shell, and the cathode and the anode are externally arranged on the shell or are internally lined in the shell;
the distance between the mixer and the polarization device is not less than 10m;
the voltage variation range of the variable frequency control is 150-220V, and the variable frequency range is 30-90Hz;
the variable-frequency electromagnetic field forms a regular electromagnetic field through the periodical change of voltage and frequency, changes the microstructure of the bactericide, improves the molecular polarity of the oxidized bactericide and the non-oxidized bactericide, and increases the sterilizing effect and the reaction efficiency of the medicament.
2. The seawater bacteriostatic system of an electromagnetic composite polarized bactericide according to claim 1, wherein: the mixer is a static mixer.
3. The seawater bacteriostatic system of an electromagnetic composite polarized bactericide according to claim 1, wherein: the length of the cathode and the anode is more than or equal to 1m.
4. The seawater bacteriostatic system of an electromagnetic composite polarized bactericide according to claim 1, wherein: the cathode and the anode are arranged outside the shell, and the cathode and the anode are wrapped on the outer surface of the shell.
5. The seawater bacteriostatic system of an electromagnetic composite polarized bactericide according to claim 1, wherein: the mixer is connected with a booster metering pump which is connected with a bactericide dosing tank.
6. An electromagnetic composite polarized bactericide seawater bacteriostasis process based on the electromagnetic composite polarized bactericide seawater bacteriostasis system of claim 1, which is characterized in that: the method comprises the following steps:
adding a bactericide into seawater circulating water, uniformly mixing the bactericide and the seawater circulating water, conveying the mixed solution into a polarization device, applying variable frequency pulse to the seawater circulating water, and performing intensified sterilization on the seawater circulating water, wherein the time of the variable frequency pulse is not less than 10s;
the voltage variation range of the variable frequency pulse is 150-220V, and the variable frequency range is 30-90Hz.
7. The seawater bacteriostatic process of the electromagnetic composite polarized bactericide according to claim 6, which is characterized in that: the temperature of the seawater circulating water is less than or equal to 90 ℃;
when the temperature of the seawater circulating water is 30-40 ℃, the voltage change range is 150-180V, and the frequency change range is 40-50Hz;
when the temperature of the circulating water is 40-50 ℃, the voltage change range is 170-200V, and the frequency change range is 50-80Hz;
when the temperature of the circulating water is 50-60 ℃, the voltage change range is 190-220V, and the frequency change range is 70-90Hz.
8. The seawater bacteriostatic process of the electromagnetic composite polarized bactericide according to claim 6, which is characterized in that: the bactericide is an oxidizing bactericide and a non-oxidizing bactericide.
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| CN201648124U (en) * | 2010-01-21 | 2010-11-24 | 党苑军 | Materialized integrated variable-frequency intelligent water treatment device |
| CN201770523U (en) * | 2010-05-24 | 2011-03-23 | 武汉国康科技发展有限公司 | Electric shock water disinfection device |
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